Presser-foot for sewing-machines



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Patented Feb 24, 1891.

W. MACK PRESSER FOOT FOR SEWING MACHINES.

Fli g 1- (No Mod al.)

UNITED I STATES PATENT OFFICE.

\VILLIAM A.- MACK, OF NORWALK, OHIO, ASSIGNOR TO THE STANDARD SEWINGMACHINE COMPANY, OF OHIO,

PRESSER-FOOT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 447,252, dated February24, 1891. Application filed July 26, 1887. Serial No. 245,306- (Nomodel.)

combination with the needle-bar or projection thereon, for operating thepresser-foot, formin g part of the attachment, as will hereinafter bedescribed in detail, and pointed out in the claims.

The object of my invention is to provide means for connection with thesaid presserbar to serve as an automatic vibrating presser,-

more especially adapted for use in the operation of etching,embroidering, braiding, and other purposes, capable of being supportedat a convenient point between the presser and needle bar, operatedthrough the medium of the latter by a lever connected to and held by anattaching frame supporting and carrying the presser-foot, whereby thedevice may be more perfectly timed with the vibrations of the needle andact with a greater degree of sensitiveness than the ordinary footdirectly attached to the end of the resser-bar in common use.

Referring to the drawings, Figure 1 represents my attachment connectedto a sewingmaohine with the presser bearing upon the cloth-platethereof. Fig. 2-represents the same invention with the presser-footelevated above the cloth-plate. Fig. 3 represents the attachmentdetached from the sewing-machine, representing the same side appearingin Figs. 1 and 2. Fig. 4 represents the same attachment at a sideopposite that shown in Figs. 1, 2, and 3; and Fig. 5 is a top view ofthe attachment.

Referring again to the drawings, A represents the frame to which all theelements forming my improved attachment are held, its entire form beingshown more clearly in Figs. 3, 4, and 5.

13 represents the post or shaft, supporting or provided with a presser,(indicated at K,) the latter being provided with a needle-hole at apoint near its toe.

0 represents a coiled spring, although it is obvious that other forms ofsprings may be employed, the chief object of the spring being to causethe Presser-foot to bear with an elastic pressure on the materialoperated upon on the cloth-plate. In the present instance the springsurrounds the shaft B, and is maintained in position by a pin orprojection (represented at a) secured to or extending through saidshaft, the opposite end being allowed to push against an' overhangingprojection or flange forming a part of the frame A.

D represents a lever with its fulcrum in the shaft 13, one end of whichis hinged to a link (represented at E) secured by a pin or rivet,(represented at D,) the other end of the link being pivoted to a flangeor projecting part of the frame proper by a pin or other means.(Represented at E To those skilled in the art it will be understood thatthe operating device, instead of being connected by a pin to the shaft,may extend through a slot therein, and may'also be pivotally connectedwith the shaft, and the end represented as hinged to the link mayintersect an opening provided to support it at the proper point, orvarious other methods might be suggested which will readily occur to amechanic skilled in the art without further explanation.

The frame is provided with a slotted flange adapted to be intersected bythe end of the presser-bar, by which it is held. The free end of thelever D engages a projection or screw,

in the present instance located at a proper point upon the needle-bar F,which projection in its ascent lifts the presser from the materialoperated upon at a time when the needle (represented at I) has beenwithdrawn at a distance above it. The spring 0 by its elasticity andlocation causes the presser of the attachment to follow the needle-barin its downward stroke until it again rests and presses upon the fabric,which is done before the needle touches the material operated upon, andthus the operator is enabled to follow a pattern, however delicate andfine, with a degree of precision hitherto extremely difficult. Thelifting of the presser by the means in the manner described enables theoperator to turn the material at the proper moment for the next thrustof the needle without difficulty and presses with a firm but an elasticpress we at the proper moment for the formation of the stitch.

Having thus set forth my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is

1. A sewingdnachine attachment consisting of a supporting plate 'orframe provided with means for connection with the presser-bar, anelastieallysupported shaft provided with a presser-foot, anactuating-lever pivoted on said shaft and having" a link connection withsaid supporting plate or frame, in combination with the needle-barprovided with a proj ection thereon for engagement with saidactuating-lever, substantially as described, and for the purpose setforth.

2. A sewing-machine attachment consisting of a supporting plate or frameprovided with a shank for detachable connection with the presser-barof asewing-machine and with a vertical slot therein, a vertically-arrangedshaft and foot carried by said supporting plate or frame, provided witha projection adapted to extend within said vertical slot in thesupporting-frame, a coiled spring, and an actuating lever pivoted tosaid vertical shaft and having a pivotal link connection with saidsupporting-plate, substantially as and for the purpose set forth.

WILLIAM A. M ACK.

\Vitnesses:

D. E. COLE, GEo. D. HENDERSON.

